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Finding the Fourth Proportional to 66,943.38, 100,415.09 and 25,390.38

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Solution

The fourth proportional to 66,943.38, 100,415.09 and 25,390.38 is: 38,085.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,943.38 : 100,415.09 = 25,390.38 : x
  2. Step 2: Convert to fraction form
    66,943.38/100,415.09 = 25,390.38/x
  3. Step 3: Cross multiply
    66,943.38x = 100,415.09 × 25,390.38
  4. Step 4: Simplify right side
    66,943.38x = 2,549,577,292.83
  5. Step 5: Solve for x
    x = 2,549,577,292.83/66,943.38
  6. Step 6: Final answer
    x = 38,085.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.